Double Cycle/Loop Length   ⌥⇧⌘.

Doubles the cycle length. The cycle area is lengthened in a forward motion. This becomes important if you change your mind and want to ‘Halve Cycle/Loop Length ⌥⇧⌘, — Halving shifts the start of the cycle forward in time. The only way to make the cycle smaller leaving the start position alone is by moving the cycle end mark backwards

Use the cycle area in Logic Pro — Apple Support

You can use the cycle area to repeatedly play a particular part of a project. The cycle area can be used for composing, practicing a part before recording, recording multiple takes, and other purposes.

Change loop settings for cells in Live Loops for Logic Pro — Apple Support

Loop Length: Determines the length of the loop. Changing the Loop Length value can be useful when you want to loop only a particular portion of a cell.

  Clean up Project…

I would start with the ‘Consolidate Project’ command –

Consolidate assets in a Logic Pro project — Apple Support

Using the Consolidate command, you can create a “consolidated” copy of a project, and select which types of assets are copied into the consolidated project.

Clean up Logic Pro projects — Apple Support

Clean up project files

1. In Logic Pro, choose File > Project Management > Clean Up.
2. In the dialog that appears, select the checkboxes for the cleanup options you want to apply to the current project.
   • Delete Unused Files: Files not used in any project alternative are deleted from the project, and removed from the Project Audio Browser.
   • Note: Selecting Delete Unused Files will also select Delete Backups.
   • Delete Backups: Backups for all project alternatives are deleted from the project.
3. Click OK.
4. A dialog appears, showing all of the files to be deleted from the project. To keep any individual files from being deleted from the project, deselect the Delete checkbox for those files.
5. Click OK.

  Go to Marker Number 12 𝍖⌃2

Move the playhead to marker number 12. The ‘Go to Marker’ keyboard commands are assigned to the keypad on the extended keyboards. I rarely jump to a specific marker, preferring to move forward and backward between them.

I try to create markers that have a definite length so I can set the locators and enable cycle for the current marker. I use the Marquee tool to select an area followed by commands to create the marker and cycle. Once that is done I can step through the marked locations in the project and work on the specific area.

Navigate using markers in Logic Pro — Apple Support

The marker numbers in these commands refer to the (serial) order of all markers in the project. By default, when you create a marker, the name shows the marker number.